f = (f1 f2) / (f1 + f2)
f(f1 + f2) = f1 f2
f f 1 + f f 2 = f1 f 2
f1 f2 - f f2 = f f1
f2 (f1 - f) = f f1
f2 = (f f1) / (f1 - f) <==== solution
Answer:
The midpoint is (2, -2) :)
Step-by-step explanation:
Midpoint formula time!
(3 + 1) / 2 + (0 - 4) / 2
=
(2, -2) :)
For the first one, its 86 square in, and the second one is 45 square cm.
Answer:
82 seats
Step-by-step explanation:
50+4x(number row - 1)
50+4x(9-1)
50+4x8
50+32
82 seats for the ninth row
